Table 1. Supported Common Commands (continued)
Command Name
Operation
Code
SCSI
Class
1
SCSI
Spec
2
Page
Applicable Conditions
3
RVC UAT NRD WRP MFC DCC
WRITE ATTRIBUTE 8Dh O SPC-3 84 yyyy-y
WRITE BUFFER 3Bh O SPC-2 83 y y ----
WRITE FILE MARKS 10h M SSC 86 yyyyyy
Note 1: O=optional M=mandatory
Note 2: SCSI specifications are as follows:
v SSC = SCSI-3 Stream Commands (SSC)
v SPC = SCSI Primary Commands-2 (SPC-2)
Note 3: Applicable Conditions are as follows:
v RVC = reservation conflict
v UAT = unit attention
v NRD = not ready
v WRP = write protect
v MFC = medium format corrupted
v DCC = deferred check condition
Note 4: Reported as appropriate for the type of Service Action and Reservation Type requested and the current reservation state of
the drive.
ERASE
Table 2. ERASE Command
76543210
0 Operation Code (19h)
1 Logical Unit Number (0) Reserved Immed Long
2 Reserved
3 Reserved
4 Reserved
5 Control
If the Long bit is set, EOD is written at the current position. A Data Set Separators
pattern is written from EOD to the end of the medium to overwrite any data
currently on the tape. If the Long bit is clear, then an EOD is written at the current
position and marks it as end of data.
If the Immediate (Immed) flag is set to 1, then the drive validates the command and
waits for any previous command from any server to complete, including any
immediate commands that are currently being processed. It also waits for any
buffered data to be flushed to tape. It then reports a deferred error for any
preceding command or buffered data, if appropriate. If there is no deferred error,
the drive reports Good status and initiates the command. If the Immediate (Immed)
flag is set to 0, status is not returned until after the command has completed.
After the command is successfully completed, the drive is positioned immediately
before End Of Data (not End Of Tape).
6 Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference
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